l10ntools/source/export.cxx: be more std::
l10ntools/source/export.cxx: be more std::

Change-Id: Ia5f96f7d2bf366a6156d198e73e7987a471f28da
Signed-off-by: Stephan Bergmann <05c31e1673f7a15a4f0f5429fb1e32d6e84bebe3@redhat.com>

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core